This is a finely crafted, solid brass sundial compass in one convenient unit. This unit allows an individual to tell the exact time by taking into account all local variables. A marker to account for the declination of the sun, a sundial,a compass with a magnetic needle. If properly used it is a highly accurate timepiece. A perfect partner to the sextant for navigation. It has black enameling for easy viewing to highlight the beautiful delicate design work. There is also a 'lock' to hold the needle in placeprevent damage,folds for easy carrying.